Hmm... Valdepe, that's the natural pace of native English speakers and you should be able to hear correctly at that pace. We have put in subtitles to help you so that you can read and understand if you can't hear something correctly.
I suggest that if you are not able to understand the conversation in a single go, you should replay it and listen. Don't forget to? repeat the phrases at the end of the conversations, that should help you really build the fluency yourself.